JPH066915A - Gas insulated switchgear - Google Patents

Abstract

PURPOSE:To shorten the axial dimension of a bus by arranging circuit chambers zigzag with respect to a bus chamber. CONSTITUTION:Circuit chambers 4 are arranged on both sides of bus chambers 30, and also as they advance in the axial direction of the bus chamber 30, the sides of being branched off the bus chambers 30 are arranged zigzag alternately. Moreover, among the circuit chambers 4, those having same axial length are arranged on the same side with respect to the bus chambers 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas insulated switchgear (GIS) in which an electric device such as a circuit breaker is enclosed in a tank together with SF ₆ gas, and more particularly to a tank arrangement thereof.

[0002]

2. Description of the Related Art FIG. 2 is a plan view showing a configuration example of a conventional gas-insulated switchgear. A plurality of T-shaped tanks 1 are linearly connected via a bellows 2, and a busbar chamber 3 is housed therein together with SF ₆ gas. Further, a tank that houses a plurality of circuit chambers 4 together with SF ₆ gas is branched from the busbar chamber 3. The circuit room 4 includes a PT circuit room 4A, a transformer circuit room 4B, a transmission line circuit room 4C, and a busbar communication circuit room 4D.
It consists of 4 types.

In FIG. 2, a busbar chamber 3 accommodates two lines of three-phase main busbars in a tank. In the PT circuit room 4A, the transformer for the instrument and the grounding switch are housed in the tank, and the voltage of the main bus is measured. In the transformer circuit room 4B, a circuit breaker, a disconnector, a grounding switch, a current transformer for an instrument, and a cable head are housed in a tank, and the cable head is connected to a separate power transformer via a cable. To be done. In the transmission line circuit room 4C, in addition to the same type of electric equipment as that provided in the transformer circuit room 5, a transformer for instruments and a lightning arrester are further housed in a tank, and a load is applied from this cable head through a cable. Supply power to the side. Busbar communication circuit room 4D
Can store a circuit breaker, a disconnector, a grounding switch, a current transformer for an instrument, and a connecting busbar in a tank, and connect or disconnect the main busbar between each line via this connecting busbar.

[0004]

However, the conventional device as described above has a problem that the axial direction of the bus chamber is long. That is, a space is required between adjacent circuit rooms for people to enter and perform inspection operations. In FIG. 2, the gap G between the circuit chambers 4 is at least 500.
If around mm is not secured, no one can pass or work. In the case of a device having a large number of circuit chambers 4, the number of gaps G also increases, and the axial direction of the busbar chamber 3 is increased.
The overall width (left and right in Fig. 2) becomes very long. Therefore, until now, unless there is a site that is long in the axial direction of the bus room 3,
It was not possible to increase the number of circuit rooms 4 installed.

An object of the present invention is to shorten the axial direction of the bus room by staggering the circuit rooms with respect to the bus room.

[0006]

In order to achieve the above object, according to the present invention, there are provided a bus room for accommodating a main bus bar and a plurality of circuit rooms branching from the bus room for accommodating electric equipment. In the configuration in which the busbar chamber and the circuit chamber are sealed with an insulating gas, the circuit chambers are alternately arranged in a staggered manner on both sides of the busbar chamber. The same thing shall be arrange | positioned on the same side with respect to a bus room.

[0007]

According to the structure of the present invention, the circuit rooms are arranged on both sides of the bus room and are staggered with respect to the bus room. With this configuration, the number of voids between adjacent circuit chambers is halved compared to that of conventional devices. Therefore, the axial direction of the bus room is significantly shortened. In such a configuration, the circuit chambers having the same axial length are arranged on the same side with respect to the bus chamber. The device width in the direction perpendicular to the axis of the bus room is determined by the width of the bus room itself and the axial length of the circuit room. If all the longest circuit rooms in the axial direction are arranged on one side of the bus room, a shorter circuit room will be arranged on the other side of the bus room, so that the width of the device can be reduced.

[0008]

EXAMPLES The present invention will be described below based on examples.
FIG. 1 is a plan view showing the structure of a gas insulated switchgear according to an embodiment of the present invention. T-shaped tank 1 in bus room 30
0s are connected via the bellows 2 by alternately changing their directions. The circuit rooms 4 are arranged in a staggered manner on both sides of the bus room 30, and the PT circuit room 4A and the power transmission line circuit room 4C branch on one side (the upper side in the figure) of the bus room 30 and the other side (the lower side in the figure). The transformer circuit room 4B and the busbar communication circuit room 4D branch off. Other configurations are the same as the conventional device,
The same parts are designated by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, there are only four air gaps G between the circuit chambers 4 on the upper side and three on the lower side in the figure. In the case of the conventional apparatus, as shown in FIG. 2, there are six gaps G on one side of the bus room 3. If the staggered arrangement is used as shown in FIG. 1, the axial direction of the bus room 30 (horizontal direction in the figure) becomes very short.
When the 77 kV, 3000 A gas-insulated switchgear is configured as shown in FIGS. 1 and 2, the axial length of the bus room is 6.3 M for the bus room 30 in FIG. 1 and 9.3 for the bus room 3 in FIG. It will be 5M. That is, according to this embodiment, the axial length of the busbar is 66.4.
It is reduced to%.

Further, in FIG. 1, all three transmission line circuit rooms 4C, which are the longest in the axial direction, are arranged on the same side. If the transmission line circuit room 4C is arranged on both sides of the bus room 30, a lot of sites are required in the direction perpendicular to the axis of the bus room 30 (vertical direction in FIG. 2).
It is advantageous that the circuit chambers 4 having the same axial length are arranged on the same side with respect to the bus chamber 30.

[0011]

As described above, according to the present invention, the circuit rooms are arranged on both sides of the bus room and are arranged in a staggered manner with respect to the bus room. With this configuration, the axial direction of the busbar is shortened by several tens of percent, and the device is greatly reduced in size. In such a configuration, the circuit chambers having the same axial length are arranged on the same side with respect to the bus chamber. This configuration also reduces the device width in the direction perpendicular to the axis of the busbar.

[Brief description of drawings]

FIG. 1 is a plan view showing the configuration of a gas-insulated switchgear according to an embodiment of the present invention.

FIG. 2 is a plan view showing a configuration example of a conventional gas-insulated switchgear.

[Explanation of symbols]

 10 Tank 2 Bellows 30 Bus Room 4 Circuit Room 4A PT Circuit Room 4B Transformer Circuit Room 4C Transmission Line Circuit Room 4D Bus Line Communication Circuit Room

Claims (2)

[Claims] 1. A busbar chamber for accommodating a main busbar and a plurality of circuit chambers branching from the busbar chamber for accommodating electric equipment, wherein the busbar chamber and the circuit chambers are sealed with an insulating gas. The gas-insulated switchgear, wherein the circuit rooms are alternately arranged in a staggered manner on both sides of the bus room. 2. The gas-insulated switchgear according to claim 1, wherein the circuit chambers having the same axial length are arranged on the same side with respect to the busbar chamber.